Fix moderation queue tab switch reload

supabase/migrations/20251011171914_7a9a6b30-b457-490c-aad8-d5a5549cb876.sql

@@ -0,0 +1,11 @@
+-- Add admin setting to control auto-refresh on tab visibility change
+INSERT INTO admin_settings (setting_key, setting_value, category, description, created_at, updated_at)
+VALUES (
+  'system.refresh_on_tab_visible',
+  'false',
+  'system',
+  'Auto-refresh moderation queue when returning to tab (default: false, realtime handles updates)',
+  now(),
+  now()
+)
+ON CONFLICT (setting_key) DO NOTHING;